Address review comment

Author: markshannon

Lib/test/test_capi/test_opt.py

@@ -1292,7 +1292,9 @@ def gen():
         def testfunc(n):
             for i in range(n):
                 gen()
+            return i
         res, ex = self._run_with_optimizer(testfunc, 20)
+        self.assertEqual(res, 19)
         self.assertIsNotNone(ex)
         self.assertIn("_RETURN_GENERATOR", get_opnames(ex))